lesson 02 - neurons and synaptic transmission

define neurons

transmit electrical and chemical messages

describe sensory neurons

connect PNS to CNS. have long dendrites and short axons

describe relay neurons

connect sensory neurons to motor neurons. have short dendrites and short axons

describe motor neurons

connect CNS to effectors e.g. muscles and glands. have short dendrites and long axons

describe the general components of a neuron

have a cell body, axon, dendrites and terminal buttons

define action potential

when a neuron is activated by a stimulus, the neuron ‘fires’ and creates an electrical impulse

define synapse

the gap between consecutive neurons

define electrical impulse

reach end of neuron ()